Re: [activities] Re: [SLUG-ANNOUNCE] Re: Experimental Live video streaming from SLUG tomorrow!

Yeah, we're about to introduce such stats into the HTML5 spec.

Both Chrome and Firefox actually have such stats already, but they are
not standardized yet.
http://blog.pearce.org.nz/2011/03/html5-video-painting-performance.html
and
https://bugs.webkit.org/show_bug.cgi?id=53322

In essence, Mozilla have implemented the following statistics into Firefox:

    mozParsedFrames - number of frames that have been demuxed and
extracted out of the media.
    mozDecodedFrames - number of frames that have been decoded -
converted into YCbCr.
    mozPresentedFrames - number of frames that have been presented to
the rendering pipeline for rendering - were "set as the current
image".
    mozPaintedFrames - number of frames which were presented to the
rendering pipeline and ended up being painted on the screen. Note that
if the video is not on screen (e.g. in another tab or scrolled off
screen), this counter will not increase.
    mozPaintDelay - the time delay between presenting the last frame
and it being painted on screen (approximately).


Webkit have implemented these:

    webkitAudioBytesDecoded - number of audio bytes that have been decoded.
    webkitVideoBytesDecoded - number of video bytes that have been decoded.
    webkitDecodedFrames - number of frames that have been demuxed and
extracted out of the media.
    webkitDroppedFrames - number of frames that were decoded but not
displayed due to performance issues.

Maybe that helps. :-)

Cheers,
Silvia.


On Fri, May 27, 2011 at 8:12 PM, Tim Ansell <[email protected]> wrote:
> I have plans to build in a little debugger which asks you questions about if
> the video presentation works and tries a bunch of other settings.
> I get a lot more diagnostics from the flash stream (you can see it as the
> bars which run across the top).
> Tim
>
> On 27 May 2011 20:07, Silvia Pfeiffer <[email protected]> wrote:
>>
>> Hi Tim,
>>
>> I've managed to get it working reliably with the flash stream. But, as
>> you know, I'd much prefer the html5 stream. :-)
>>
>> With HTML5, I get the stream and it works for a few minutes, but
>> invariably stops and then just sits there. I run Firefox nightly,
>> 6.0a1 build of 22nd May.
>>
>> It seems that the problem is that once the player stalls (probably
>> because it runs out of buffered video data), it doesn't restart again
>> when it has more buffered. It just goes into stalled mode. I say that
>> because if I hit pause and play again, it recovers and plays again.
>>
>> Not sure what could be done to overcome this, but to be honest, it
>> kinda works for me. :-)
>>
>> Nice work on the setup, btw!
>>
>> Cheers,
>> Silvia.
>>
>>
>> On Fri, May 27, 2011 at 6:05 PM, Tim Ansell <[email protected]> wrote:
>> > Couple of tips,
>> > The system supports HTML5 (H264, Ogg Theora and WebM) and Flash
>> > streaming,
>> > this should cover most desktop browsers. The system does not support
>> > mobile
>> > systems yet (which includes the iPad), it might work, but it's more
>> > likely
>> > it won't.
>> > If you are having problems viewing the video, please try the following
>> > things and send me a report.
>> >
>> > Try switching to the SD stream. You can do this two ways, one by
>> > clicking
>> > the HD button in the corner twice, or by going to
>> > http://tims-video.appspot.com/slug?hdoff=True
>> > Try switching to the Flash stream. You can do this by going
>> > to http://tims-video.appspot.com/slug?flashonly=True
>> > Try switching to both the Flash SD stream. You can do this by going
>> > to http://tims-video.appspot.com/slug?flashonly=True&hdoff=True
>> >
>> > If the stream freezes at any time, please try and reload.
>> > If you have other problems like the sound being quiet or the display
>> > being
>> > wrong in anyway, or if you can't get the stream to work, please send me
>> > an
>> > email with the following details;
>> >
>> > Browser Type (Chrome, Safari, IE, etc)
>> > Exact Browser Version (a screenshot of the about page would be awesome!)
>> > Operating System - as much detail as possible (IE Ubuntu Lucid 64bit)
>> > The speed and type of Internet connection you have. (IE ADSL, Cable,
>> > ADSL2
>> > and 256k, 6M). You can find this information in your ADSL model.
>> > Please go to  http://www.speedtest.net/ and send me the numbers the
>> > widget
>> > reports.
>> > Anything else you think is important.
>> >
>> > Thanks
>> > Tim
>> > On 26 May 2011 10:01, Tim Ansell <[email protected]> wrote:
>> >>
>> >> Hello everyone,
>> >> I'm currently trying to set up live video streaming for events held at
>> >> Google like FP-Syd, SLUG and SyPy. Tomorrow at SLUG we are going to try
>> >> a
>> >> second round of testing. There is no guarantee that it will work at
>> >> all, so
>> >> please don't rely on the stream but if your bored and want to help out,
>> >> please do join in!
>> >> If you would like to participate in the trial, please go to the
>> >> following
>> >> URL from 6pm onwards;
>> >>   http://tims-video.appspot.com/slug
>> >> As a backup the following JustinTV channel should also be transmitting
>> >> the
>> >> same stream, please use the primary video channel to help with testing.
>> >>   http://www.justin.tv/mithro1
>> >> The system has twitter and IRC integration, so tweet with the #sydlug
>> >> hashtag, and join the irc://irc.freenode.org/#slug IRC channel.
>> >> Tim 'mithro' Ansell
>> >
>> > --
>> > SLUG - Sydney Linux User Group Announcements List - http://slug.org.au
>> > More info: http://lists.slug.org.au/listinfo/announce
>> >
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